Seal Subscriptions bug - Variants change resets the Selling Plan

[SGMM]

I have sent this query to Seal Subscriptions but thought I'd try my luck here.

I have set up my subscription rule with two Selling Plans ( send every '2 weeks' or send 'monthly') for a product that has two variant options which the customer selects from a drop down, as per the image below.

The customer is likely to first select their selling plan, and then select their variants - BUT there is a bug in that when the variants are changed the selling plan goes back to the default option of '2 weeks'. 

This is a) not good for UX and b) a customer could miss the change and end up with the wrong order.

Does anyone have a fix or any ideas? TIA

One better but not perfect idea would be to switch around the selections so the customer is choosing their variants first, but I don't know how to do this.