Some more rebus puzzles

I have some more Rebus puzzles:

Seeing how the first lot were a bit easy I decided to make these a bit harder. Good luck!

HINT FOR 3:

It has something to do with the fact that they are numbers i.e letters wouldn't work

Hint for 3 and 4:

For 4, it has something to do with the positioning of a certain letter/letters. For 3, there is no summing involved and the underlining just under lines the last number

Next lot: Even more rebus puzzles!

• @Silenus I wanted some variation... Is it possible to change the name of a puzzle? – Wen1now Dec 30 '16 at 3:16
• PSA: No letters are missing from the alphabet in the bottom left one. – greenturtle3141 Dec 30 '16 at 5:42
• Since the duck one is kind of misleading (sorry) I have update the photo. And @greenturtle3141 I put all the letters in but it's not that relevant. – Wen1now Dec 30 '16 at 6:01
• Not sure it matters as the answer was found but normally when you put one word/string 'in' another as part of a cryptic clue it is together as a whole, not interlaced with the other word. – Arth Dec 30 '16 at 10:25

Community wiki:

The first one is

Walking on thin ice (walking = stick figure, on = position, thin ice = 'th' in 'ice')

The second one is

Sitting duck

The third one is

Last but not least

The fourth one is

High L and S = highlands (answer by OP)

The fifth one is

Back out

The sixth one is

Hole in one

The bottom row:

Alphabet soup, back out, hole in one.

• Nice work! 2/3; the first one is somewhat harder than that. – Wen1now Dec 30 '16 at 2:53
• The second in your list could also refer to the Australian countryside. – Hugh Meyers Dec 30 '16 at 13:13

First one is

Walking on thin ice (walking = stick figure, on = position, thin ice = 'th' in 'ice')

I think the second one is

Sitting duck (clearer after update)

• Yep that's it. Sorry about the old one. – Wen1now Dec 30 '16 at 7:02

Could the third one be

because

for proper summing, you need the numbers to be right aligned?

I think the third one is

Last but not least

• Welcome to puzzling! Yes, this was what was intended... although I do see a lot of other creative options out there – Wen1now Oct 31 '17 at 7:45

Some alternative guesses..

Third one:

Bottom line

Fourth one:

Letter bomb

For the fifth one..

I quite like 'outback' instead of 'back out' here :)

• Third one could also be above the line – DyingIsFun Dec 30 '16 at 20:59

I think the second one might be

THE UGLY DUCK(LING)

• Good guess, but not correct – Wen1now Dec 30 '16 at 4:48

First:

Walking on Thin Ice

Second:

Sitting Duck

Third:

"In Summary" or "Grand Total"... though I love Glorfindel's answer "This doesn't add up"

Fourth:

Mix Up

Fifth:

Backout

Sixth:

Hole in One

My take on the fourth, based on the hint:

Cornered (Corner "D")

Any confirmation on which ones are right and which are still yet to be solved?

1. Walking on thin ice (stick figure walking on thin ice)

2. Sitting duck ( you'll see the word duck sitting)

3. Last but not least

4. Alphabet soup

5. Backout

6. Hole in one