請問在這兩句中英文的時式


一、My parents have gone to London for one year and are leasing an apartment.
句中疑點是用and 連接時態並不一致,一個為現在完成式,另一為現在進行式。why?
二、Auction sites like eBay have made purchasing used belongings popular.
為什麼have+p.p.後再接purchasing 為何不 have + purchased 或 have been purchased呢?
請高手指點一、二。
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