I like using Anagrammer for hooks and I noticed the highlighting can be a little off. But maybe only in certain instances?

For example...
YOUR TILES = AS?
MATCH THIS = AS (check suffix)

Results show BAS, FAS, GAS and so on with the bold red letter indicating the wild card letter... B, F, G, etc.

However, a duplicate letter displays bold/red in the "incorrect position," as in AAS, which highlights the second A instead of the first. Since the "Match This" tiles are AS, the bold/red wildcard letter should not be one of those tiles.

Ok, so let's try this one...

YOUR TILES = ARDVARK?
MATCH THIS = ARDVARK

Results are AARDVARK but the highlighted A is aardvArk rather than Aardvark.