Important question about Omaha

I am fairly new to Omaha hi/lo and was playing the other day online. I was dealt A8810 in a tourney and the flop came 435, then 9's on both the turn and river. I called this and was beat low but my hand was A3458 while the other player had 34567. Basically is this correct? I thought Ace high (well low) beats 3 high (low) with a low hand?

Thanks for the help!

go backwards, not forwards. 7 low beats 8 low.

Damn this confuses me so if that is the case then a2347 doesnt beat 23456 for example?

Yep, now you're getting the hang of it.

A2345 is of course the best low. Second best is A2346 since after the 6 everything else is the lowest possible. Next would be A2356, and then 23456. All these hands are automatically better than any low hand that uses a 7 since you start from the end and work your way down.

*Obligatory guide pimpage*

Easiest way to look at low, read it as a number backwards. In you example 85,431 vs 76,543. Whichever one is a smaller number wins the low.