Warrant within a warrant https://www.tsx.com/resource/en/436
It appears that the initial offer was at variance with TSX Policy 4.2, Prospectus Offerings, which might explain the the reason for amended supplement:
"1.6 Unit Offering
The following requirements apply to unit offerings that include Warrants:
(c) A Warrant comprising part of a unit must not entitle the holder to acquire a Warrant upon exercise;"
The first offer allowed the underwriters to purchase a broker's compensation warrant for $1.60, which included within another warrant for $2.00
If this is the case, then it might explain why EXRO increased the initial offer size, that is, to help compensate the brokers for the revenue they could have have made from the $2.00 warrant.