Hi Nikki and welcome!
You do seem to have a similar problem as CherryA has experienced, as you have both used an ash shade on very light hair. Again, I wonder if your hair could be porous - if so this could be the reason why your hair has brought out the the ashy tones in 101 Natural Baby (Ash) Blonde.
If hair is porous, the top cuticle layer stands open and this makes hair act as a sponge and the tone of the colour is soaked up showing through the already lightened hair. Hair can be porous if you apply colour on top of colour, instead of following the root application method. It is also caused by normal every day things such as brushing and using hairdryers and straightening irons. If you have had holidays in strong sunshine this will contribute as will swimming in chlorinated pools. To help prevent porous hair, make sure you have regular trims, care for your hair with colour shampoos & conditioners and a treatment once or twice a week.
To get rid of this ashy tone, you can try 100 Natural Pale Blonde, this shade does not have any tones in it and will help to neutralise the ash. Please first carry out a strand test to see if it will be OK to apply all over and to work out the correct development time for your hair. Good luck!