Submitting a buildvariant filter auto-adds a skip

Steps to repro:
1) Go to https://evergreen.mongodb.com/waterfall/mongodb-mongo-master
2) Put 'Enterprise Ubuntu 18.04' in the filter variant box.

Actual result:
Land on https://evergreen.mongodb.com/waterfall/mongodb-mongo-master?bv_filter=Enterprise%20Ubuntu%2018.04&skip=5

Expexted result:
Land on https://evergreen.mongodb.com/waterfall/mongodb-mongo-master?bv_filter=Enterprise%20Ubuntu%2018.04